# seodata.dev, free, Anonymous: Related keywords API

> A lookup returns volume, CPC, competition and a list of similar keywords for one keyword in one country.

seodata.dev's related keywords API on its Anonymous plan. It costs $0.00 per 1,000 keywords. It returns 2 of the 6 key fields we check: Search volume, Cost per click.
We haven't run seodata.dev through [our related keywords API benchmark](https://datacircle.dev/best-related-keywords-api.txt) yet.
This plan is free. We rank 169 plans for related keywords APIs by price. Half the plans cost $0.45 per 1,000 keywords or less.
[XMLRiver's ₽15,000 monthly plan](https://datacircle.dev/related-keywords-apis/xmlriver/15000-monthly/llms.txt) is the cheapest paid plan per 1,000 keywords: $0.00009. XMLRiver charges for each page of results. We count 2,000 keywords on each page to get the $0.00009 price.
[seodata.dev's $4.99 monthly plan](https://datacircle.dev/related-keywords-apis/seodata-dev/4-99-monthly/llms.txt) covers any number of keywords. seodata.dev's $4.99 monthly plan costs less up front than XMLRiver's ₽15,000 monthly plan.
[Bing Webmaster Tools](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free/llms.txt), [DataForSEO](https://datacircle.dev/related-keywords-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-ideas-live/llms.txt) and [Mangools](https://datacircle.dev/related-keywords-apis/mangools/15-monthly/llms.txt) are the best related keywords API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/related-keywords-apis/seodata-dev/free-anonymous
- [Related keywords API: 6 providers compared on price and data](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://www.seodata.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: `GET https://api.seodata.dev/v1/keyword`
- API key: not needed
- Its API docs: https://www.seodata.dev/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Sold by: seodata.dev (https://seodata.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 33%
- Search volume: ✓
- Cost per click: ✓

## Price

- $ per 1,000 keywords: $0.00
- Per: page of 10
- Billing: free

## Charges

- Also pays for: nothing else

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: A lookup returns volume, CPC, competition and a list of similar keywords for one keyword in one country.

## Data

- Freshness: stored
- Keep data: no limit
- Use data: Don't attempt to bypass limits, scrape the website at volume, or disrupt the service. Don't resell raw access to the API as a competing keyword-data service. Don't send personal or confidential information as keywords. [...] You can use the results in your own products, reports, content and datasets, including commercially.

## Plan

- Pay: $0
- You get: 20 requests a day
- Enough for: 20 pages a day

## Rate limit

- Per day: 20
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: q. Optional: country
- Method: GET
- Path: /v1/keyword

## About the plan

- Plan: Anonymous
- Who can get it: anyone, no account or key (20 lookups a day per IP address)

## The 4 fields the plan's answer can hold

keyword, search volume, cost per click, overlap

## seodata.dev's plans (3)

- [seodata.dev, free, Anonymous](https://datacircle.dev/related-keywords-apis/seodata-dev/free-anonymous/llms.txt): $0.00 per 1,000, 33% complete, stored
- [seodata.dev, free, GET /v1/keyword](https://datacircle.dev/related-keywords-apis/seodata-dev/free-get-v1-keyword/llms.txt): $0.00 per 1,000, 33% complete, stored
- [seodata.dev, $4.99 monthly](https://datacircle.dev/related-keywords-apis/seodata-dev/4-99-monthly/llms.txt): no limit, 33% complete, stored

## seodata.dev's calls (1)

- `GET /v1/keyword`: [seodata.dev, free, Anonymous](https://datacircle.dev/related-keywords-apis/seodata-dev/free-anonymous/llms.txt)

## seodata.dev's APIs (2)

- [seodata.dev: keyword research API pricing, 3 plans](https://datacircle.dev/keyword-research-apis/seodata-dev/free-anonymous/llms.txt)
- [seodata.dev: related keywords API pricing, 3 plans](https://datacircle.dev/related-keywords-apis/seodata-dev/free-anonymous/llms.txt)

## seodata.dev: related keywords API alternatives

- [Bing Webmaster Tools, free](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free/llms.txt): $0.00 per 1,000, 17% complete
- [DataForSEO, free, $1 trial credit, POST /v3/dataforseo_labs/google/keyword_ideas/live](https://datacircle.dev/related-keywords-apis/dataforseo/free-1-trial-credit-post-v3-dataforseo-labs-google-keyword-ideas-live/llms.txt): $0.00 per 1,000, 100% complete, 1 month
- [AnyAPI, free trial key, POST /v1/run/ahrefs.keyword_ideas](https://datacircle.dev/related-keywords-apis/anyapi/free-trial-key-post-v1-run-ahrefs-keyword-ideas/llms.txt): $0.00 per 1,000, 33% complete, stored
- [WordRadar, free](https://datacircle.dev/related-keywords-apis/wordradar/free/llms.txt): $0.00 per 1,000, 0% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05.

- https://api.seodata.dev/v1/keyword?q=headless+cms&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.seodata.dev/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.seodata.dev/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.seodata.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.seodata.dev/support?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.seodata.dev/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing